Plant Diseases
Biology ⇒ Plant Biology
Plant Diseases starts at 7 and continues till grade 12.
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See sample questions for grade 8
A farmer notices yellowing and wilting of tomato plants. What should be the first step in identifying the disease?
Describe how environmental conditions can influence the development of plant diseases.
Describe how insects can help spread plant diseases.
Describe one way plant diseases can spread from one plant to another.
Explain why early detection of plant diseases is important.
A farmer notices yellowing and wilting of tomato plants. What should be the first step in identifying the disease?
A farmer uses the same set of tools on healthy and diseased plants without cleaning them. What is the risk involved, and what practice should be followed to prevent disease spread?
A group of plants in a greenhouse suddenly develops brown, sunken spots on their stems. The temperature and humidity have been unusually high for several days. Explain how these environmental conditions could have contributed to the outbreak of disease and suggest two ways to prevent further spread.
Which of the following is a bacterial plant disease?
(1) Late blight
(2) Bacterial wilt
(3) Downy mildew
(4) Leaf curl
Which of the following is a common method to prevent viral diseases in plants?
(1) Using virus-free seeds
(2) Over-fertilizing
(3) Flooding fields
(4) Planting infected plants
Which of the following is a method to control fungal diseases in plants?
(1) Applying fungicides
(2) Overwatering
(3) Planting the same crop every year
(4) Ignoring infected plants
Which of the following is a method to diagnose plant diseases?
(1) Observing symptoms
(2) Laboratory testing
(3) Both 1 and 2
(4) None of the above
Fill in the blank: _______ are chemicals used to kill or control fungi that cause plant diseases.
Fill in the blank: _______ are tiny organisms that can cause plant diseases and are often spread by insects.
Fill in the blank: _______ is the process of removing and destroying infected plant material to control disease spread.
Fill in the blank: The organism that causes a disease is called a _______.
True or False: All fungi that grow on plants are harmful.
True or False: All plant diseases are caused by living organisms.
True or False: All plant diseases can be cured with chemicals.
True or False: Environmental factors like drought or pollution can cause plant diseases.
